> Looks like this is an answer.>>> Now I exclude the recyclebin objects>> SQL> select sum(bytes/1024)/1024 from dba_segments where tablespace_name => 'PCM_D_01' and segment_name not like 'BIN$%';>> SUM(BYTES/1024)/1024> --------------------> 536900>

This is quite interesting, I wasn't previously aware of this
issue with recyclebin.

This might be playing havoc with my script for determining
space in the database, guess it would be a good idea
check which is being used - dba_extents or dba_segments.